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1)  elastic multilayer
层状弹性体
1.
Coupling with the elastic multilayer foundation,a model of reinforced pavements was proposed.
利用层状弹性体与薄膜竖向位移与应力的连续性将二者耦合,建立了土工合成材料加筋道路的计算模型。
2.
Secondly, a model of reinforced pavements was proposed by coupling the elastic multilayer foundation and membrane equation according to the continuity of stress and displacement.
然后根据竖向位移与应力的连续性,将层状弹性体模型与薄膜方程相耦合,建立了土工合成材料加筋路面的计算模型。
2)  elastic multilayered half space
弹性层状体
3)  multi-layered viscoelastic body
层状黏弹性体
1.
To study impact on water to asphalt pavement, the solution is derived by means of the transference of matrix and integral transformation to the axis-symmetrical problems of super-pressure of the multi-layered viscoelastic body in small opening water on asphalt pavement in the FWD dynamic case.
为研究水对沥青路面的影响,利用积分变换和传递矩阵的方法推导了FWD动荷载作用下路基路面层状黏弹性体超孔隙水压力轴对称问题的解析解。
4)  layered elastic system
层状弹性体系
1.
Primarily it introduces the layered elastic system theory and analyzes the analytic solution of stress and displacement when the composite pavement has been explored on the isothermal load.
课题主要以理论分析为主,采用层状弹性体系力学中的弹性半空间体地基上双层板理论及三层弹性体系理论,分析了加铺沥青面层的水泥混凝土路面在等温载荷作用下应力和位移的解析解。
5)  elastic layered system
弹性层状体系
1.
According to the theories of artificial neural networks and elastic layered system, the author discusses the fitting problem of the maximum tensile stress in the bottom of surface and base for three- layered elastic system by means of the three-layered BP neural network.
根据神经网络与弹性层状体系理论 ,采用三层BP网络研究了三层弹性层状体系的面层和基层层底最大拉应力的拟合计算问题 ,通过大量的计算和验证 ,训练好的网络精度高、速度快、适用范围广、泛化能力强 ,且易于实现 ,可应用于工程设计和验算及一般的科研工
2.
Based on “Specifications for design of highway asphalt pavement” (JTJ014-97) and the theory of neural networks, a new method to calculate the deflection of three-layer elastic layered system with a three-layer BP neural network is presented in this paper.
以《公路沥青路面设计规范》( J T J014 - 97) 为依据,根据神经网络理论,提出采用三层 B P 网络近似计算柔性路面三层弹性层状体系理论弯沉的方法。
3.
In this paper, elastic layered system theory is employed to analyze the stress between pavement and roadbed interface under axle symmetrical loading; Discussing how stress between pavement and roadbed interface is affected by Parameter of pavement structure (including every layer s thickness.
本文利用多层弹性层状体系理论,分析了路面结构在行车荷载作用下的应力。
6)  elastic layered theory
弹性层状体理论
补充资料:含铋层状氧化物铁电体
分子式:
CAS号:

性质:化学通式为:(Bi2O2)2+(Ax-1BxO3x-1)2-,式中,x为钙钛矿层厚度方向的元胞数,其值为1~5;A为较大阳离子,配位数为12;B为较小阳离子,配位数为6。A、B离子组合应满足∑XAVA+∑XBVB=6x,式中,x为相应于A、B位离子浓度,V为相应于A、B位离子的离子价态。这类层状氧化物中凡具有铁电行为的化合物就称为含铋层状结构氧化物。其结构是由二维钙钛矿层和层有规则地相互交替排列而成,沿层面具有较好的解理性。自发极化强度较高。压电性能和介电性能的各向异性大。居里温度高。自发极化强度、机械品质因素、频率的时间稳定性和温度稳定性都较高。常规陶瓷工艺很难获得致密烧结体,需用热压烧成新工艺。:PbBi2Nb2O9,BaBi2Nb2O9,SrBi2TaO9,Bi4Ti3O12,PbBi4Ti4O15,PbBi4Ti5O18等属这类铁电体。用于制作滤波器,换能器等。

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